Marissa Mayer has a winner: Project Homerun, the crucial redesign of Yahoo's homepage, is going wider.

Yesterday, TechCrunchconfirmed our earlier reports with the additional news that more users are seeing a revamped homepage, whose primary feature is a persistent search toolbar that stays with you as you scroll down.

Our sources tell us that this redesign was in the works before Mayer took over. But she has pushed a faster pace of change at the company, setting demanding timelines and quicker action. The rapid expansion of the Project Homerun test shows she's having a real effect on the company.